Improvement in furnaces



J. F. BELLEVILLE.

Furnaces.

N0.48,l67, Patented March 3,1874.

ilu-iran Stearns Permit rriren.

JULIEN FRANQOIS BELLEVILLE, OF SAINT DENIS, FRANCE.

IMPROVEMENT IN FURNACES.

Specification forming part of Letters Patent No. 148,167, dated March 3, 1874; application filed I September 5, 1873.

To all whom it may concern.

Be it known that I, JULIEN FRANoIs BELLEVILLE, civil engineer, of Saint Denis, France, have invented an Improvement in Furnaces, of which the following is a specication:

The invention relates to steam-generators known by the name of the Belleville boiler; and the improvements refer to a smoke-consumin g furnace.

The smoke-consuming furnace is shown in Figs. l and 2, with a continuous feed.

My improvements will be well understood from the following description and the accompanying drawing, in which- Figure l is a longitudinal section of the improved generator complete, and Fig. 2 a front elevation of the same with the doors removed.

The envelope L of the generator is constructed partly of bricks and partly of sheet and angle iron. The doors serve for the -visiting and cleansing of the generator.

My arrangement is characterized, first, by the employment of two grates, respectively called the large grate cl2, and the little grate e2. The large grate d2 is formed with a surface the inclination of which from the horizontal increases progressively from the summit to the base in the form of a curve, Fig. 1, the tangents of which at the summit and base form angles, which dilfer about from nineteen to twenty degrees from the horizontal.` The angle of the direction of the curve formed by the grate can also vary.from thirty to forty degrees, according to the nature of the combustible and the greater or lesser condition of immovability of the grate, due, for example, to the shaking of marine or locomotive engines. Secondly, by the employment of a ret verberatory panel, g2, arranged behind the furnace, opposite the grate d2. This panel, formed from refractory bricks, accumulates the heat, and provides the grate, through radiation, with the heat indispensable for the distillation and ignition of the raw combustible in proportion as it descends upon the grate. It may be vertically inclined, or arranged in the form of a vault. Thirdly, by the employment of a movable obturator, i2, serving to close the upper portion of the grate for about one-half of the length, which prevents the access of air across the bars of the upper portion of thc grate, or confined to the desired amount, at pleasure. Fourthly, by the employment of movable partitions jl, of metal or refractory earth, in order to divide the combustible into horizontal slices in the direction of the in- Y clined plane of the grate, in order to facilitate its lighting, and to render its descent as regu-v lar as possible throughout the breadth of the grate. Fifthly, by the employment, as a large grate, of a grate, cl2, composed of transverse bars, arranged so as to support one another in the form of a Venetian blind, with a curved or straight surface.

A- platform or flame-breaker, O, is intended to force the hot gases to divide themselves as equally as possible upon all the parts of the heating-surface. Movable lateral obturators are intended to interrupt the too direct pasd sage of the flame betweenthe tubes and the In order to light the furnace, the necessary quantity of dry wood is placed upon the little grate e2. Then, through the hopper a2, coal or other mineral combustible is introduced until the grate is filled from the bottom to the top.'

yThe door of the hopper is then closed, and, by

means of the obturator t2, the passage of the air across the upper half of the large grate dz is cut, and the wood is lighted in the empty space f2, which exists between the two grates. This space is closed by one or several movable trays. When the upper part of the grate is lighted, the obturator 2 is opened just enough to feed this part of the grate sufficiently with 1. The combination of the two grates L2 @2 with the reverberatory panel g2, as described. 2. The combination of the two grates d2 e2 air. Yheu the reverberntonv panel g2 has alttained a red heut, the coul distils in proportion i :1s it reaches the head ot' the grate, and passes into the state of eolie. lt then descends by with the movable obturator v?, so as to close its own weight; und by the aid of n pusher. l the upper part of the grate d2, as and for the und then fresh l'uel is added. The coke is purpose substantially as described.

gradually pushed until it reaches the little In testimonywhereof Ihwe signed myname grate, where rhe burning is completed. to lhis speeiliezuion before two subscribing For generuting-furnace of stemnboats. n witnesses. tubular grate. with 'uter eireulation. muy be Witnesses: J. F. BELLEVILLE. applied. JULES ARMENGAUD,

l claim- `ALJBERT UAHEN. 

